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using Ryujinx.HLE.FileSystem;
using Ryujinx.HLE.HOS.Ipc;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace Ryujinx.HLE.HOS.Services.FspSrv
{
class IDirectory : IpcService, IDisposable
{
private const int DirectoryEntrySize = 0x310;
private Dictionary<int, ServiceProcessRequest> m_Commands;
public override IReadOnlyDictionary<int, ServiceProcessRequest> Commands => m_Commands;
private List<DirectoryEntry> DirectoryEntries;
private int CurrentItemIndex;
public event EventHandler<EventArgs> Disposed;
public string DirectoryPath { get; private set; }
private IFileSystemProvider Provider;
public IDirectory(string DirectoryPath, int Flags, IFileSystemProvider Provider)
{
m_Commands = new Dictionary<int, ServiceProcessRequest>()
{
{ 0, Read },
{ 1, GetEntryCount }
};
this.Provider = Provider;
this.DirectoryPath = DirectoryPath;
DirectoryEntries = new List<DirectoryEntry>();
if ((Flags & 1) != 0)
{
DirectoryEntries.AddRange(Provider.GetDirectories(DirectoryPath));
}
if ((Flags & 2) != 0)
{
DirectoryEntries.AddRange(Provider.GetFiles(DirectoryPath));
}
CurrentItemIndex = 0;
}
// Read() -> (u64 count, buffer<nn::fssrv::sf::IDirectoryEntry, 6, 0> entries)
public long Read(ServiceCtx Context)
{
long BufferPosition = Context.Request.ReceiveBuff[0].Position;
long BufferLen = Context.Request.ReceiveBuff[0].Size;
int MaxReadCount = (int)(BufferLen / DirectoryEntrySize);
int Count = Math.Min(DirectoryEntries.Count - CurrentItemIndex, MaxReadCount);
for (int Index = 0; Index < Count; Index++)
{
long Position = BufferPosition + Index * DirectoryEntrySize;
WriteDirectoryEntry(Context, Position, DirectoryEntries[CurrentItemIndex++]);
}
Context.ResponseData.Write((long)Count);
return 0;
}
private void WriteDirectoryEntry(ServiceCtx Context, long Position, DirectoryEntry Entry)
{
for (int Offset = 0; Offset < 0x300; Offset += 8)
{
Context.Memory.WriteInt64(Position + Offset, 0);
}
byte[] NameBuffer = Encoding.UTF8.GetBytes(Path.GetFileName(Entry.Path));
Context.Memory.WriteBytes(Position, NameBuffer);
Context.Memory.WriteInt32(Position + 0x300, 0); //Padding?
Context.Memory.WriteInt32(Position + 0x304, (byte)Entry.EntryType);
Context.Memory.WriteInt64(Position + 0x308, Entry.Size);
}
// GetEntryCount() -> u64
public long GetEntryCount(ServiceCtx Context)
{
Context.ResponseData.Write((long)DirectoryEntries.Count);
return 0;
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
Disposed?.Invoke(this, EventArgs.Empty);
}
}
}
}
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